Only get good sleep when its really cold
I've struggled to get good sleep consistently for a long time. I've been doing a bunch of trial and error and recording statistics.
I've found that I can really only get my best quality sleep when its 14 degrees Celsius (57.2f) and I've since learnt that that's kind of weird and most people would consider that way too cold. Interestingly while I like to sleep when its this temp, when I wake up I do find it too cold and I will turn on the heater.
On days when it is that temperature, I can just naturally sleep in and I wake up feeling refreshed and ready to take on the day. On days that are hotter I often wake up before I mean to (I've found 9.5 hours of sleep is best for me), and often wake up a few times throughout the night, and also wake up feeling slightly too warm for comfort.
I've got eczema which may be related. I've got floor to ceiling windows which I do think makes me room heat up a lot quicker (but I've moved my sleep so I wake up at 8 rather than 9am and it hasn't made much of a difference). I've used a handheld infrared thermometer to test my body temp and normally throughout the day it's mid to low 30 degrees (around 86 - 95f), and when I wake up Im generally around 38-39 degrees (100f) but I'm at that temperature no matter what temperature my room is.
I've tried changing blankets but in my brief tests it didn't really change much for the better, possibly because the blanket was too big for my bed.
I've been trying to get good sleep myself consistently for a very long time and it's just not working so I thought I might as well try and ask for advice/help.
Oh and I forgot to mention this all matters because my cooler only goes down to 18 so the only way I can get my room to be 14 degrees or lower is its a particularly cold night and that doesn't happen often.